/*******************************************************************************
 * Copyright 2017 Bstek
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License.  You may obtain a copy
 * of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations under
 * the License.
 ******************************************************************************/
package com.bstek.urule.runtime.rete;

import com.bstek.urule.Utils;
import com.bstek.urule.debug.MsgType;
import com.bstek.urule.model.rule.lhs.EvaluateResponse;
import com.bstek.urule.model.rule.lhs.NamedCriteria;
import org.apache.commons.lang.StringUtils;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * @author Jacky.gao
 * @since 2015年1月8日
 */
public class NamedCriteriaActivity extends AbstractActivity {
    protected NamedCriteria criteria;
    private boolean pass;
    private boolean debug;

    public NamedCriteriaActivity(NamedCriteria criteria, boolean debug) {
        this.criteria = criteria;
        this.debug = debug;
    }

    public List<FactTracker> enter(EvaluationContext context, Object obj, FactTracker tracker, Map<String, Object> variableMap) {
        String referenceName = criteria.getReferenceName();
        if (pass) {
            if (StringUtils.isBlank(referenceName) || variableMap.containsKey(referenceName)) {
                return null;
            }
        }
        List<Object> allMatchedObjects = new ArrayList<Object>();
        EvaluateResponse response = criteria.evaluate(context, obj, allMatchedObjects);
        boolean result = response.getResult();
        doDebug(response, context);
        if (result) {
            if (StringUtils.isNotBlank(referenceName)) {
                variableMap.put(referenceName, obj);
            }
            context.setPrevActivity(this);
            pass = true;
            tracker.addObjectCriteria(obj, criteria);
            for (Object object : allMatchedObjects) {
                tracker.addObjectCriteria(object, criteria);
            }
            return visitPahs(context, obj, tracker, variableMap);
        }
        return null;
    }

    private void doDebug(EvaluateResponse response, Context context) {
        if (!debug || !Utils.isDebug()) {
            return;
        }
        String id = criteria.getId();
        StringBuffer sb = new StringBuffer();
        sb.append("^^^命名条件：" + id);
        String result = response.getResult() ? "满足" : "不满足";
        sb.append(" =>" + result);
        System.out.println(sb.toString());
        context.debugMsg(sb.toString(), MsgType.Condition, debug);
    }

    @Override
    public boolean orNodeIsPassed() {
        return false;
    }

    @Override
    public void reset() {
        pass = false;
    }
}
